Hoist.



E. Y'. MOORE.

HOIST. APPLIGATIOR PILEDJUNE 9, 1996,. i Patented Jan. 11,1910.

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WITNESSES. INVENTUR.

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it may cancer-mu I 'Be it known-that I, EDWARD .Y. Moore, a

EDWARD Y. moo-anon .CLEVELAND;\ 0310;

nois'r.

Spectficationof Letters Patent.

' Patented. Jan. 11,; 91'o.

Applicaticnffiled t e 9, 1906. serial No, 320,932.

citizen. of the United States, residing at glfevelanm in the county ofCuyahoga-and I State of Ohio, have invented a certain new and-usefulImprovement 'inHoists, of which ratejthe'yoke.

.- f lhepresent invention is an improvement thef-followin is a Patent 3grated 1904 shows and claims-a hoist wherein] the raisingisvaccomplished by a yoke witlriinternalteeth surrounding anexconnectedwith the main pulley, spirit of rotatable eccentricsservingtogyonthe one ust referred to and is designed to increase theefficiency of such. a. hoist. It

characterized by the employment of a of'gy'rating', yokes with internalso "arranged as tobalance' each other, reducing thefrictiononthe'bea-rings and a thereby'increasing the'eiiiciency of the hoist,

Th "invention 1s he':?einafter=more fully fieecribed and. its essentialcharacteristics setout in the claims.

.j'The gs show my improved hoist embodied in an apparatus 'suspensiblefrom ahook having a hand chain wheel.

igurel'is a vertical cross section of the ,ho ist; Fig. 2 is-a sideelevation thereof with the cover for the gears removed; Fig-3 is a a hokCswiveled between them.

the side members of the frame is the raising chainpulley ormain-pulleyD. This pulley is rotatably carried by the frame members,

plan partiallyin section; Fig. e'is a sectional', elevation taken justinside-the lefthand: frame member of Fig. .1, showing the .two'yokes inplace,

'isafsimilarvrew with the left hand yoke removed; F 6 is a horizontalsection through.

one of the double driving eccentrics, as indicated by the line p is aperspective, illustrating the double eccentrici j The frame of thehoist, as shown, consists of two side members A and A"bolted together attheir upper ends and embracing Between the supporting means shown beinga sta: tionary hollow sleeve G, which extends from one g full, clear,and exact descripton, re erence being had tothe accompany n'g' drawings.i

gears J andJ respectively.-

but omitting the gear- ,teeth on theinner yoke,for clearness; Fig. 5

66 of Fig. 4; and Fig. 7

the shaft F. Each frame member-to the other and consti .tutes virtuallya portion of the frame. The

mainishaft F, of the hoist extends through the sleeve G and carries atone end a pinion H, which meshes witha pair of gears J and J which gearsare connected with gyrating mechanism adapted to engage an external.gear 'd, forming an extension of the main pulley .D A suitable plate Aisshown as covering the gears, being. secured to a flange a on theframe; member A;

' The description given in the above paragraph. responds to'the'hoist'shown in my patent referred to. In that patent, however, thegyrating. mechanism connecting .the gears J andJ with the external gear(2 consists of a single yoke and two eccentrics,*one

connected with the gear J and the other with the gear J. In the presentinvention I provide a plurality of yokes side by side, two 1 and beingshown in the drawings.

These yokes are mounted on the two mutiple eccentrics K and. K,connected When. two yokes are employed, each'eccentric is formed doubleas shown in Figs.

6 and 7, and comprisestwo eccentric portions Z; and is, located,in-parallel planes and extending in diametrically opposite directions.These eccentric portions have the sameaxis which is the axis of theextensions-Z'e and 7: of the double eccentric, which extensions form thejournals-whereby the double eccentricis rotatably mounted in the framemembers A and A. Theextension 72 furthermore provides means for securingthe gear J, or J which is keyed on such. eccentric and further held bythe jam nut j. Between the two portions 70 and 7c of the doubleeccentric is a flange portion 76* which forms a washer between theyokesE and E.

with the The double eccentric member described is preferably made of asingle piece of metal.

Surrounding the periphery eccentrics k and k are a series of rollers Lwhich reduce the friction with the yolres. The outer ends of theserollers are guided by the frame members and the inner ends by the flangek.

I 'From what has heendescribed it will be apparent that when the shaft Fis rotated the two double eccentrics are simultaneously rotated causingthe twojyokes E and E to te. The external gear d, and hence'the mainpulley D, are thus caused'to rotate at a speed slower than the speed ofrotatlon of mtion depending on the (inference-be gyration of. "the'yokes $15 the external gears d .a small fportlcn of.

tween the number of teeth on-the external gear and the yoke.

I Where but one yoke is employed a raising force-equal to the weight ofthe load becomes applied to the gear d, and when this raising force isacting downward the thrust on the main bearingsis substantially twicethe load. By dividing the yoke in two and: providing each eccentricdevice with two portions ex- 10 acting upward on the gear at wh tendingin. opposite directions, one yoke is ile the other i is acting downward.The thrust on the bearings caused by this lifting force therefore I vcounterbalances itself, reducing the friction won the bearing by approxitely as much as 50% in some portions of the rotation. Likewise thelateral thrust on the eccentrics counterbalances itself, because i whenone yoke is pulling in one direction and the other is pulling in theother, the downward thrust on the eccentric bearings is correspondinglyreferred to shows a spring,

reduced. The aggregate reduction in fric-- tion causes a veryconsiderable increase in efiiciency of the hoist. Moreover, the raisingaction is much smoother.- My prior patent v helping support the weightof yoke and reducing the jerking. The present invention is moreeificient and saves the expense of the spring. .The reduction in thethrust on the various bearings I also increases'the life of the hoist.Thus the vantages: operation and. longer life.

present improvement introduces three adincreased efiiclency, smootherThe hand chain wheel is shown as mounted on the shaft A and connectedwith it through afriction brake which operates to prevent the loadrunning down. This brake is shown and claimed'in Patent No. 7 94,997granted to me July 18, 1905. Briefly described, it includes a metal cupQ, loosely 'journaled'on a collar P, on the shaft. The

cup has ratchet 'teeth on its exterior with which meshes a pawl Ycarried by the frame,

the ratchet teeth'being in such direction that they may click idly underthe pawl when the load is raised. 7

S indicates friction disks which are alter-.

natel'y secured to the collar P and to the cup Q. Gutside of the disksis a pressure plate T, against which bears the hand chain wheel N. Thiswheel has an inclined surface 07., cooperating with an incline 'w, on acollar W, rigid on the shaft. The result of this. is that when the .handchain wheel is turned in the direction to cause the incline n to rideup. on the incline 'w, the-handpham wheel is forced inward, clamping thedisks,

and the cup and disks rotate as a whole with the shaft and hand chainwheel. When the elevating ceases, the clamped brake holds the cup rigidwith the shaft, and the pawl thusv holds the load against descandmg. Tolower the load, the hand chain wheel is turned backward allowing it to'move away I said gear at different points,

from the clamping plate ,T,. relieving the disks and allowing the load,to descend,

During suchdescent the pull {on the hand chain wheel scending load.

'I claim:

1. In a hoist-, th eombination-of'twoee-f eentrics Ilgld with eachother, a gear rigid with said eccentrics, a meshingdriving gear,

two gyrating members operated by said eccentrics, and raising mechanismoperated by said gyratmg members. i

2. Ina hoist, the combination of. an external gear, a plurality of yokeslocated side by'side and having internal teeth engaging and mechanismgeared together for gyrating said yokes.

3. In a hoist, the combination of an ex-. ternal gear, a. plurality ofyokes having internal teeth engaging said gear at different; points, andtwo driving members geared-together and each havin a plurality ofeccentrics for gyrating'sai yokes.

keeps it advance of .-'the 119 v .7

4:. In a hoist, the combination of a driv-.

ing gear, a shaft having two .eccentrics, a gear on said shaftconnecting with the gear first mentioned, two gyrating members operatedby said eccentrics, and raising mechanism operated by saidgyratingmembers.

5. Ina hoist, the combination of an external gear, members placed sideby side. and surrounding the external gear and having internal gear.teeth adapted to simultaneously mesh with the external gear at dif-.ferent points respectively, two driving devices, both cooperating witheach member for gyrating them in orbits which are similar butdifferently located, and mechanism' connecting said driving devices andinsuring their simultaneous operation.

6. In a hois't, thecombination of an .external gear, two yokes placedside by side and, surrounding the external gear and having internal gearteeth adapted to mesh with opposite sides. of the external gearrespectively, a pair of double eccentrics each having two eccentricportio s which extend in opposite directions and re adapted to drive andguide said yokes and ing the two eccentrics.

7. In a hoist, the combination of a pulley, mechanism for rotating it,including a -plu-. rality of gyrating'members, eccentric mechanismforgym-ting said members, said'mechanism comprising eccentrics extendingfrom ea rin connectb C the same axis indifferent directions, one' from acommon axis in difier'ent directions, ,one eccentricfor 'each'yoke, anda flange between the eccentrics serving to separate the yokes. Y

a hoist the combination of aframe, a.-' pai.r of. eccentric member'sJOHIIIalEd therein, each eccentric member comprisingljtwo eccentrics.extending in opposite directions with a flange between them, two

yolges 'having openings surrounding said eccentrics, rolling membersbetween. the

. yok'es-a-nd eccentrics and'con'fined betweensa 'idflai1g'e and. theframe, and an external 'g learin' mesh with internal gears formed on I1D. In a hoist,

said y'okes.

v the combination with liftln'gjmechanism and a plurality of gyratingpperating members, of a plurality of driv ing members therefor, eachdriving member comprising two eccentrics rigid "with each other, andcommon means for driving said plurality of driving members.

11. In a hoist, the combination with ent members.

" 12. Ina hoist, the combination of an ex- I ternal gear and "aplurality of yokes for driving the same and operating means gearedtogether and engaging each yoke at two. separated points.

- 13. In a'hoist, the combination of an ex- .ternal gear, a plurality ofyokes having inwardly projecting teeth and surrounding said externalear, drivingmechanisms'engaging the yo ice at two points for alter-Znately moving said yokes, and movable mechanism connecting said drivingmechanisms and insuring their simultaneous operation.

14. In a hoist, the combination of a pulley, a gear connected therewith,a pair of driving eccentrics, means operated by the eccentrics forrotating the said gear, said means being arranged to balance itselfwithout the employment of a spring, and gearing connccting theeccentrics.

15. In a hoist, the combination of a frame comprising a pair of sideplaies brought r gether near their tops and a hook swii'eled in saidplates their junction. a pulley carried by the frame beneath the hoolg,a gear on said pulley, a plurality ofyokes surrounding the pulley, apair of eccentrics operating in openings in both yokes, and

11a ,ingfme'chanism'anda-plurality of gyrating' rollers rolling betweenthe peripheries of' tl1e eccentrics and the; openings in'the yoke.

'16. 1 In a hoist, the combination of a pulley, 1

internal'and external meshing gearing for driving the same, one portionof such gearing comprising'a plurality of members, a plurality of.separated eccentrics for driving said members, and gearing connectingsaid eccentrics together.

1'7. In a hoist,the combination of a pulley,

a gear connected-therewith, a plurality of geared members meshing withsaid gear, a plurality of eccentrics each adapted to operj ate with saidplurality of members, and

gearing. connectin said eccentrics, whereby they operate in unison.

1-8. In a ho1st,tne combination of a pulley,

,. an external gear connected therewith, a plurality of internal gearssurrounding the external gear, a plurality of eccentrics, each operatingon'all of S 211d 'l11t6II13.l gears, and gearing connecting saideccentrics.

19, In a hoist, the combination of a pulley,

an external gear connected therewitln t'wo internal gears surroundingthe external gear,

two sets of eccentrics, each set cooperating with both internal gears,and gearing connecting the-two sets of eccentrics.

20. In a hoist, the combination of a pulley,

.a gear connected therewith, a plurality of yokes surrounding the gearand having teeth engaging it at different pe nts, a pair of eccentricmembers each co jprising as' manyeccentrics' as there are yokes, whicheccentricsextend 1n dlfierent d1rect1ons,-and

gearing connecting the twoeccentrics, whereby they operate in unison. V

21. In a ho1st,the combn'iation of a pulley,

an external gear connected therewith, a plurality of yokes surroundingthe gear and extending onto each side thereof, a plurality ofeccentric-members engaging the yokes on different sides of the gear, twomechanisms for driving said eccentric members and gearing connectingsaid tiivo mechanisms.

22. In a'hoist,the combination of a pulley, an external gear thereon.two internally geared yokes surrounding the external gear, two eccentricmembers for drivmg the yokes, each member having a plurality ofeccentrics. agear on each eccentric member, and a driving gear meshingwith said gears.

In testimony whereof, I hereunto atlix my signature in the presence oftwo witnesses.

EDWARD Y. MOORE.

Witnesses:

ALBERT'H. Barns, G. A. MYERS.

